roll back the upgrade of the bundled setuptools_trial from 0.5 to 0.5.1

roll back the upgrade of the bundled setuptools_trial from 0.5 to 0.5.1
Upgrading setuptools trial in that way leads to a very tricky problem in setuptools's handling of recursive installation of the build-time dependencies of build-time dependencies...

rolling back:

Tue Feb  3 22:17:18 MST 2009  zooko@zooko.com
  * setup: bundle new setuptools_trial-0.5.1

    A ./misc/dependencies/setuptools_trial-0.5.1.tar
Tue Feb  3 22:17:32 MST 2009  zooko@zooko.com
  * setup: remove old bundled setuptools_trial

    R ./misc/dependencies/setuptools_trial-0.5.tar